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(No Model.) 2 Sheets- Sheet 1.V

Si Tl SIGNAL AND SWITCH INTBRLOGKING APPARATUS.

Patented Dec. 27, 1892.

1f lllllllun (No Model.) 2 Sheets-Sheet 2.

S. T. DUTTON. SIGNAL AND SWITGH INTBRLOGKING APPARATUS.

Patented Dec. 27, 189.2.`

IMQ/dbf.'

SAMUEL TELFORD DUTTON,

oE woRoEsTER, ENGLAND.

SIGNAL AND SWITCH INTERLOCKING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 488,805, dated December27,1892.

Applicationiiled October 12,1892. Serial No. 448,692. (No model.)Patented in Belgium November 30, 1887, No. 70,748; in England September20, 1888, No. 18.570,l in India May 31, 1889, No. 175; in France .Tuly19, 1889, No. 199,683; in New South Wales August 14, 1889, No. 1,627,and in Victoria September 5, 1889, No. 7,069.

To a/ZZ whom, it may concern:

Be it known that I, SAMUEL TELEORD DUT- TON, a subject of the Queen ofGreat Britain and lrelan d, residing at Marl Bank, in the city andcounty of Worcester, England, have invented certain new and usefulImprovements in Apparatus for Securing and Indicating the Movements ofPoints on Railways; and 1 do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

Patents for this invention have been obtained in the followingcountries: Great Britain, No. 13,570, dated September 20, 1888; BritishIndia, No. 175, dated May 3l, 1889; New South Vales, No. 1,627, datedAugust 14, 1889; Victoria, No. 7,069, dated September 5, 1889; Belgium,No. 70,748, dated November 30, 1887; and France, No. 199,683, dated July19, 1889.

This invention relates to apparatus for securing and indicating themovements of railway points; and it consists in the novel constructionand combination of the parts hereinafter fully described and claimed.

ln the drawings: Figure 1 is a plan View of the complete apparatus; andFig. 2 is a side View of the locking devices. Fig. 3 isa crosssectiontaken on the line o: y in Fig. 1. Fig. 4f is a diagram showing in a planview the application of the apparatus in distant signaling. Fig. 5 is across-section taken on the line y in Fig. 1.

A A are the switch tongues.

B B are the rails. p

C is the base plate of the apparatus for locking the points. f

A carrier h is provided, and is pivoted at one end on the pin hprojecting vertically from the base plate. The other end of the carrieris provided with supporting rollers h3 h4 which run upon the base platewhen the carrier is oscillated. A blade g is supported by the carrier hand is provided with a rib g" underneath it having a notch g2. Twoslides a3 and at slide in the said notch g2 and are connected to thetongues A and A respectively. The slides a3 and c4 have notches a5 and arespectively, and when the points are 5o set right for the facingdirection, as shown in Fig. 1, these notches are both opposite the partgB of the locking rib g', so that the blade g can be movedlongitudinally. The blade gis provided with a shackle at one end so thatit may be connected to and operated bya lever in the signal cabin in theordinary manner.

An upper signal-bar f slides in a bracket on the base plate above theblade g. This bar f is provided with a rod f2 at one end for connectingit to the facing signal. The other end of the bar f has a fork or gab f3pivoted to it by the pin f6. A pin]c5 projects from the bar f andengages with a guide slot f4 in the gab. The gab f3 engages with a ping4 projecting from the blade g, and is held in engagement with the saidpin by means of the spring f7 riveted to the bar f and bearing againstthe gab. If desired, the fork or gab f3 may be rigidly secured to thebar f, and the spring and the guide pin and slot may be dispensed with,but the spring-pressed gab is preferred.

D is the ground lever box, and D is the lever for actuating the switchpoints. The points are represented as set right for the facingdirection, and the locking apparatus is in gear. A rod d2 is provided,and is connected at one end to the lever D', and at the other end to thelock e which is pivoted to a bracket projecting from the base plate C.This rod operates to lock the lever D when the signal j is lowered, andit also locks the upper signalbar f when the points are moved in thetrailing direction.

K is a weighted crank pivoted to a bracket on the base plate C. Thiscrank is provided with an arm K which engages with a hole h5 in thecarrier h and holds the carrier in its normal position, which permitsthe deflection of the facing signal and holds the switch points in theirfacing position, as shown in Fig. 1. When the barf is in its normalposition, and the facing signal is at danger, a notch f8 in the bar fcomes opposite the lock e, so that if the switch points are moved, therod 67,2 is also moved in the direction of the arrow in Fig. 3, andthereby turns the lock e on its pivot and causes the portion e2 of thelock to enter the notch f 8 of the bar f, and prevents the bar f frombeing moved to lower the signal. Should however the facing signal bedeflected, the bar f, then being in its forward position, presents asolid surface to the lock e and thereby prevents the lock from moving,and consequently prevents the movement of the points, to which the lool;is connected by the bar cl2.

The dotted lines on the right side of Fig. 3 show how the bar can beconnected to the other side of the lock e, if desired.

The action of the apparatus is as follows: Then the facing signal isrequired to be deflected, and the switch points are set right and are intheir facing position, the signalman moves the blade g longitudinally bymeans of his operating lever, and thereby locks the switch points. Thisaction i also moves the barf which is connected to the blade g by thepin g4, and also moves the rod f2 and thereby dellects the facingsignal. The switch points must be right forthefacingdirection before thesignal can be deflected, otherwise the notches a5 and a would not beopposite the part g3 of the rib g', and the bladeg and bar f could notbe moved to deflect the signal. Vhen the points are right for the facingdirection, and the facing signal has been dellected, the blade g locksthe slides 01,3 and a4 because the rib g is moved to engage with thenotches in the said blades, and the switch points are thereby locked inthe desired position. 'When a train passes in the trailing direction, itopens the points automatically, and the slides a3 and a4 turn thecarrier 7L on its pivot against the resistance of the weighted lever K,when the signal has been deflected. This movement of the carrier slidesthe pin g4 out of gear with the gab f3 and releases the barffrom theblade g and allows the facing signal, which is connected to the bar f,to rise to its danger position automatically. Vhen the last vehicle hascleared the switch points, the weighted crank forces the carrier and thepoints back to their normal position,which is right for the facingdirection, and the disconnection of the gab f3 from the pin g4 rendersthe signal apparatus inoperative until an attendant has gone to thepoints and reconnected the gab to the pin, seeing at the same time thateverything is in good order at the points. It will be noticed that nodamage is done to the locking apparatus by the points being run throughin the trailing direction while it is in gear, and locking the points inthe facing direction.

Fig. 4 also shows how the apparatus can be worked from a signal cabin Zat a considerable distance from the points. F is an intermediate groundlever for working the locking devices. There are two levers a a in thecabin Z. Of these, the lever ct is connected to the lever F by a rod b,and the lever F is connected to the blade g by the rod c. The lever a isconnected to the signal E bya wire o which passes over the pulley w.

The action of the apparatus is substantially the same as hereinbeforedescribed.

lVhat I claim is:

l. The combination, with the points, and the notched slides a3 and a4,of the pivoted carrier 71 the blade g supported by the said carrier andprovided with the notched rib g engaging with the said slides, and thebar f, for working the signal, detachably connected to the said blade g,substantially as and for the purpose set forth.

2. The combination, with the points, and the notched slides a3 and a, ofthe pivoted carrier 71 the blade g supported by the said carrier andprovided with the notched rib g engaging with the said slides, the bladef for working the signal, and the spring-actuated gab]3 detachablyconnected to a pin on the blade g, substantially as and for thepurposeset forth.

3. The combination, with the points, and the notched slides a3 and a4,of the pivoted carrier h, the blade g supported by the said carrier andprovided with the notched rib g engaging with the said slides, the barf,for workingthe signal,operatively connected with the blade g, and thepivoted locking plate e connected with the points and adapted to lockthe barf, substantially as and for the purpose set forth.

In testimony whereof I affix my signature in the prese-nce of twowitnesses.

SAMUEL TELFORD DUTTON.

Witnesses:

SUTTON CARBEAU, Engineer, Shrub Hill, Worcester.

G. W. BULL, Accountant, Railway Signal l/Vofrts, lVorces-

